edje: Edje_Edit - add functions that allow user to set and get the value of states limit property

Summary:
This commit contains two new functions edje_edit_state_limit_get() and
edje_edit_state_limit_set(). These functions allow user to set and get value of
states 'limit' property value. Also it provides an internal type to represent
limits (Edje_Edit_State_Limit) and implements printing of limits value on edc code
generation.

Reviewers: cedric, Hermet, seoz, raster

CC: reutskiy.v.v, cedric

Differential Revision: https://phab.enlightenment.org/D1048

Signed-off-by: Cedric BAIL <c.bail@partner.samsung.com>

src/lib/edje/Edje_Edit.h

@@ -3110,6 +3110,54 @@ EAPI Eina_Bool edje_edit_state_step_set(Evas_Object *obj, const char *part, cons
 EAPI Eina_Bool
 edje_edit_state_step_get(Evas_Object *obj, const char *part, const char *state, double value, int *step_x, int *step_y);
 
+/** Set the states limit parameter value.
+ *
+ * Set limit causes the emission of signals when the the size of part changes
+ * from zero or to a zero size in corresponding to the limit value.
+ * For example, the signals emitted on width changing are <i>'limit,width,over'</i>
+ * and <i>'limit,width,zero'</i>
+ * The availble values are:
+ * <ul>
+ * <li>NONE - 0 (the default value)</li>
+ * <li>WIDTH - 1</li>
+ * <li>HEIGHT - 2</li>
+ * <li>BOTH - 3</li>
+ * </ul>
+ *
+ * @param obj Object being edited.
+ * @param part Part that contain state.
+ * @param state The name of the state.
+ * @param value The state value.
+ * @param x The horizontal step value.
+ * @param y The vertical step value.
+ *
+ * @return EINA_TRUE in case of success, EINA_FALSE otherwise.
+ * @see edje_edit_state_limit_get()
+ * @since 1.11
+ */
+EAPI Eina_Bool edje_edit_state_limit_set(Evas_Object *obj, const char *part, const char *state, double value, unsigned char limit);
+
+/** Get the states limit value.
+ *
+ * Returns value that represents the states limit value:
+ * <ul>
+ * <li>NONE - 0 (the default value)</li>
+ * <li>WIDTH - 1</li>
+ * <li>HEIGHT - 2</li>
+ * <li>BOTH - 3</li>
+ * </ul>
+ *
+ * @param obj Object being edited.
+ * @param part Part that contain state.
+ * @param state The name of the state.
+ * @param value The state value.
+ *
+ * @return The value that represents the states limit value in case of success, othervise returns 4.
+ * @see edje_edit_state_limit_set()
+ * @since 1.11
+ */
+EAPI unsigned char edje_edit_state_limit_get(Evas_Object *obj, const char *part, const char *state, double value);
+
 
 //@}
 /******************************************************************************/

src/lib/edje/edje_edit.c

@@ -5576,6 +5576,23 @@ edje_edit_state_step_get(Evas_Object *obj, const char *part, const char *state,
    return EINA_TRUE;
 }
 
+EAPI Eina_Bool
+edje_edit_state_limit_set(Evas_Object *obj, const char *part, const char *state, double value, unsigned char limit)
+{
+   GET_PD_OR_RETURN(EINA_FALSE);
+   if (limit >= EDJE_STATE_LIMIT_LAST)
+     return EINA_FALSE;
+   pd->limit = limit;
+   return EINA_TRUE;
+}
+
+EAPI unsigned char
+edje_edit_state_limit_get(Evas_Object *obj, const char *part, const char *state, double value)
+{
+   GET_PD_OR_RETURN(EDJE_STATE_LIMIT_LAST);
+   return pd->limit;
+}
+
 /**************/
 /*  TEXT API */
 /**************/
@@ -8945,6 +8962,28 @@ _edje_generate_source_of_state(Evas_Object *obj, const char *part, const char *s
    if (!pd->visible)
      BUF_APPEND(I5"visible: 0;\n");
 
+   if (pd->limit)
+   {
+      switch (pd->limit)
+        {
+         case EDJE_STATE_LIMIT_WIDTH:
+           {
+              BUF_APPEND("limit: WIDTH;\n");
+              break;
+           }
+         case EDJE_STATE_LIMIT_HEIGHT:
+           {
+              BUF_APPEND("limit: HEIGHT;\n");
+              break;
+           }
+         case EDJE_STATE_LIMIT_BOTH:
+           {
+              BUF_APPEND("limit: BOTH;\n");
+              break;
+           }
+        }
+   }
+
    if (pd->align.x != 0.5 || pd->align.y != 0.5)
      BUF_APPENDF(I5"align: %g %g;\n", TO_DOUBLE(pd->align.x), TO_DOUBLE(pd->align.y));
 

src/lib/edje/edje_private.h

@@ -796,6 +796,14 @@ typedef enum {
   EDJE_PART_LIMIT_OVER
 } Edje_Part_Limit_State;
 
+typedef enum {
+  EDJE_STATE_LIMIT_NONE   = 0,
+  EDJE_STATE_LIMIT_WIDTH  = 1,
+  EDJE_STATE_LIMIT_HEIGHT = 2,
+  EDJE_STATE_LIMIT_BOTH   = 3,
+  EDJE_STATE_LIMIT_LAST   = 4
+} Edje_Edit_State_Limit;
+
 #ifdef HAVE_EPHYSICS
 typedef enum {
   EDJE_PART_PHYSICS_BODY_NONE= 0,